Fracturing working method of multilevel hydraulic spraying segmentation fracturing tubular column

Abstract

The invention discloses a fracturing working method of a multilevel hydraulic spraying segmentation fracturing tubular column. The method comprises the following steps of S1, carrying out the drifting and well washing before loading the multilevel hydraulic spraying segmentation fracturing tubular column into a well; S2, assembling the multilevel hydraulic spraying segmentation fracturing tubular column; S3, loading a drilling tool into the well and adjusting the drilling tool to a construction position; and S4, installing a wellhead and a ground pipeline, and testing the pressure. The fracturing working method is simple, the multilevel spraying encapsulation tool is connected according to the stratum quantity needing to be acidified and fractured so as to carry out the fracturing construction on different stratums, so that six sections or more than six sections of hydraulic spraying and fracturing can be cooperatively constructed through a way for pulling the tubular column in one trip, the construction speed can be greatly increased through the serial connection of multiple spraying encapsulation tools, and the construction time can be saved.

Description

[0001] technical field [0002] The invention relates to a fracturing working method of a multi-stage hydraulic jet staged fracturing pipe string, which is used for well completion stimulation measures in the oil and gas drilling process, and relates to the technical field of design and manufacture of acidizing fracturing construction tools. Background technique [0003] The hydrojet staged reconstruction technology was developed in the late 1990s and is widely used abroad. It is the product of the combination of hydrojet and fracturing technology. Flat well multi-stage construction technology, which can be used for fracturing in various completion methods such as open hole, cement-consolidated casing, unconsolidated screen pipe, etc. Compared with that, the construction efficiency can be greatly improved. The principle of hydrojet staged fracturing technology is to convert pressure energy into kinetic energy. After the fluid in the tubing is pressurized, it will spray out ...

AI Technical Summary

Problems solved by technology

[0006] 2. Segmented multi-layer fracturing tools with immovable pipe string hydraulic jet with sliding sleeve structure, packer optimization structure with sliding sleeve + backwash channel, etc. + one-time multi-layer fracturing QHY341 packer with step-by-step unsealing The development and application of domestic literature has been reported, but there is no mention of the technical content of the packer that can be selectively set, has a sliding sleeve structure and liquid flow channel control

However, limited by the nozzle material and the performance of the packer, if more than 3 sections are to be constructed, the pipe string needs to be replaced, which increases the operating cost and the operating cycle, and both economic and social benefits are disadvantageous.

[0013] 3. A single-stage spray gun with a packer is used for combined hydraulic jet fracturing. Due to the limitation of the material performance of the nozzle, continuous use of a single spray gun for more than 2 hours may cause the spray gun to fail due to excessive wear, and the packer may also be damaged due to Repeated setting leads to seal failure. At present, only 3 sections can be constructed. If more than 6 sections are designed and constructed, drilling tools need to be tripped out, which increases the construction cycle and operating costs.

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